I have noticed for some the lies are actually the way they observe a situation (broken mind)....or if you ask a specific question & one little part may not be quite right, they will deny it rather than correcting the part that isn't quite right. Ugh, I lived with a guy like that for 33 years. I always knew what the truth was though (usually a financial issue).....or the priceless lies are the ones of omission. Yea, got that alot....."if I don't tell her then I am not actually lieing".
Or another thing I have encountered was that he was too ignorant to know what he was doing & years later I am finding out how it is affecting me financially. Too stupid to know what he was actually doing or if he knew he wasn't going to tell anyone & think he could get away with it. This time his crap may land him in jail. So many who lie don't experience any negative consequences & think they can just get away with it. Ends up biting them in the rear sooner or later when we have had more than enough